<div class="card">
  <div class="header">
    <div class="btn"></div>
    <div class="btn"></div>
    <div class="btn"></div>
    <div class="active">JS console...</div>
  </div>
  <div class="content">
  <div class="req">
     console.log(a<span>*</span>b);
  </div>
  <div class="res error">
    <span>ReferenceError</span>{" <span>a is not defined </span>"}
  </div>
   <div class="req">
     console.log(2<span>*</span>3);
  </div>
  <div class="res">
   6
  </div>
 
  </div>

</div>


<style>
/* From Uiverse.io by Yaya12085 - Tags: card */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  max-width: 290px;
  height: 254px;
  background: #2b2b2b;
  margin: 0 2px;
}

.card .header {
  height: 30px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  background-color: rgb(17, 17, 17);
  padding-left: 4px;
}

.card .header .btn {
  margin-left: 8px;
  height: 12px;
  width: 12px;
  border-radius: 50%;
  cursor: pointer;
}

.active {
  cursor: pointer;
  position: relative;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fefe;
  background-color: #2b2b2b;
  height: 100%;
  margin-left: 10px;
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
  font-size: 12px;
}

.card .header div:nth-child(1) {
  background-color: rgb(255, 102, 0);
}

.card .header div:nth-child(2) {
  background-color: rgb(247, 202, 1);
}

.card .header div:nth-child(3) {
  background-color: rgb(10, 184, 10);
}

.card .content {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  flex: 1;
  line-height: 125%;
  color: #fff;
}

.card .content .req, .card .content .res {
  padding: .2em 1.6em;
  border-bottom: 1px solid rgba(102, 101, 101, 0.685);
  font-size: 12px;
}

.card .content .req {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  position: relative;
  color: #fff;
}

.card .content .req::before {
  position: absolute;
  content: "";
  border-left: 1px solid rgb(177, 176, 176);
  border-bottom: 1px solid rgb(177, 176, 176);
  padding: 4px;
  left: 2px;
  height: 0;
  width: 0;
  background-color: transparent;
  transform: rotate(220deg);
}

.card .content .res {
  margin-top: 4px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  position: relative;
  color: #fff;
}

.card .content .res span:nth-child(1) {
  color: rgb(230, 103, 103);
  font-style: italic;
  margin-right: 8px;
}

.card .content .res span:nth-child(2) {
  color: rgb(77, 245, 43);
}

.card .content .res.error {
  background-color: rgba(255, 0, 0, 0.05);
}

.card .content .res.error::before {
  position: absolute;
  content: "X";
  padding: 3px;
  left: 2px;
  height: 6px;
  width: 6px;
  background-color: rgba(255, 0, 0, 0.644);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 500;
}
</style>
